Heat economizer



7 Sept. 11, 1928. 1,684,049

J. c. WILSON HEAT ECONOMIZER Filed March 28,-1927 2 Sheets-Sheet 1 I I lqveyfor vJ. (F.Wilooy .rSept. 11, 1928. I 1,684,049

J. c. WILSON HEAT ECQNOMI'ZER Filed March 28, 1927 2 Sheets-Sheet 2' Patented Sept. 11, 1928.

UNITED. STATES JAMES C. WILSON, OF WINNIPEG, MANITOBA, CANADA.

HEAT ECONOMIZER.

Application filed March 28, 1927. Serial No. 179,140.

The invention relates to improvements in heat economizers and an object of the in vention is to provide a heat economizer designed to be introduced in the rlue leading from a furnace, boiler or other heating ap paratus. the economizer being constructed such that the otherwise waste heat passing out the flue can be extracted and utilized to advantage.

A further object of the invention is to construct theheat economizer so that itcan be readily installed and such that the various parts comprising it can be readily taken apart for inspection, cleaning or other purpose and such that the travel of the smoke can be readilycontrolled by the adjustable member provided.

With the above more important and other minor objects in view which will become more apparent as the description proceeds, the invention consists essentially in the arrangement and construction of parts hereinafter more particularly described,reference being'had to the accompanying drawings, in which Fig.- 1 is a side view of the economizer as it appears when connected to the customary heating furnace.

Fig. 2 is an enlarged detailed vertical sectional view centrally through the economizer and a portion of the furnace.

Fig. 3 is a horizontal sectional-view at 8-3' Figure 2.

Fig. 4: is a vertical sectional view showing a modified arrangement of the damper.

Fig. 5 is a perspective view showing the upper end of the damper rod and parts associated therewith.

In the drawings like characters of reference indicate corresponding parts in the several figures.

The economizer comprises a base 1, a body 2, a hood 3 and outer preferably adjacent. the back of the customary heating furnace to which it is connected. I have herein furnace with which my device is associated such comprising the combustion chamber 5, the cold air chamber 6 and the flue pipe 7 leading from the combustion chamber'.-

The base of the device is in the form of a suitably reinforced metallic ring which rests on the basement floor and is herein shown as reinforced by providing circumscribing corrugations 8 and 9. Thebody, 2 of the economizer is in the form of a cylindrical casing.

casing 4L and is located shown only those parts of the;

the lower end of which telescoped over the upper end of the ring and rests on the upper corrugation. The ends of the casing are closed by upper and lower heads 10 and 11, the lower head being-permanently fas tened to the base whilst the upper head is in head and their upper ends terminating short of the upper head. The upper ends of the tubes receive telescopically the lower ends of short tubes 14: permanentlysecured to the upper head and opening therethrough. By arranging the tubes in this way, it is an'easy matter forone to clean the tubes when occasion arises as one canreadily lift off the cap or head 10 and then clean the tubes 13 with a brush is customary practice.

. It will be'observed that the tubes only occupy approximately one half the casing which is that side of the casing remote from the furnace. The flue pipe 7 leading from the combustion chamber of the furnace opens to the interior of the casing next the furnace and here it will be observed that I have placed a horizontally disposed baffle plate 15 within the casing 2 in a location directly above the entrance end of the flue pipe. The inner edge of the battle plate terminates adjoining the central tubes and the wall of the casing carries a pair of vertical guides 16 and 17 which slidably receive a damper 18.

The outer casing 4 is spaced from and surrounds the casing 2 and is somewhat shorter than the same and provides an annular air chamber 19 opening at the bottom to atmospheric air and at the top to the interior of the hood. The outer casing is held in place by suitable supporting brackets 20 positioned between the said casings and secured to the same. The hood 3 tele-' scopically receives the upper end of the outer casing and is herein shown'as tapering to a neck 21 to which I have attached an elbow 22 and a hot air pipe 23.

The damper is provided centrally at the upper edge with an eye'Q l which receives the lower hooked end of the damper rod 25. The damper rod passes upwardly through a suitable hole 26 provided in the hoo and has the upper end thereof bent at right angles to provide a handle 27. The hood carries an upstanding stationary lOil 28 which is fitted with spaced teeth 25) and the handle of the damper rod is adapted to be caught on one or other of the teeth depending on the adjustmentit is desired to give the damper.

The casing 2 is provided at the side re mote from the pipe 7 and towards the upper end thereof with a flue pipe 30 which passes through the outer casing and communicates with the customary chimney not shown. A cold air pipe 31 connects the cold air chamber of the furnace with the interior of the base ring 1.

When this device is in use, one adjusts the damper 18 as experience dictates. The hot gases passing from the fire pot of the furnace enter the interior of the casing 2 through the pipe 7 and are then required by the damper to travel downwardly and enter the area containing the tubes. The hot gases in travelling from the lower end of the damper to the pipe 30 serve to heat the tubes and in so doing effectively heat the cold air admitted to the lower end of the tubes through the pipe 31. This heated air passes from the tubes to the pipe 23 and can be led through such pipe to any place it is desired to heat, such as one of the rooms o a house. lVhilst l have shown one pipe leading from the hood 3, it will be readily understood that several pipes could be led fromit to various locations where heat is required.

Obviously the adjustment of the damper will control the length of travel of the hot gases in respect to the tubes. I have found that if there be a particularly good chimney draft one can move the damper well. down whereas if there be a poorer draft, the damper will have to be raised.

In Figure 4 l have shown a modification of the damper arrangement. Here I have provided a vertically disposed stationary ballle Wall 32 in the location occupied by the damper 18 in the other figures and have provided the stationary bathe wall centrally in the upper end with an outlet opening 33 directly opposite the flue pipe 7. The stationary bafiio Qwall carries guides 34 and whiclr receive slidably a damper 86, the damper being mounted to operate over the opening 33 and being controlled by a damper rod 37 corresponding to that of 25. Obviously a direct or indirect draft could be had by manipulating the damper 36.

Whilst I have shown the heat economizer aslocated directly at the back of the furnace,

it will be readily understood that this is simply a matter of choice as it permits of short connections. Further it will be noted that the pipe 31 does not necessarily require to communicate with the furnace outside air can be brought directly from the cellar if desired.

I have found that the upper end of? the asing 21 becomes quite hot and accordingly- I have provided the outer casing so that I can utilize such heat to heat the air in-the annular air space 19, such being drawn in from the cellar and being discharged into the hood where itmingles with the heated air from the tubes. The lower part of the casing 2 is supplied with a clean out plug 38.

What I claim as my invention is 1. A heat economizer comprising a cylindrical casing, ried by the casing, a removable upper head enclosing the upper end of the casing, a vertically adjustable damper within the casing, a horizontal baffle wall extending between the damper and the adjacent wall of the casing, said damper and battle wall ,dividing the interior of the easing into two compartments, sets of telescoping tubes carried by the heads and extending through one of the compartments and having their lower ends communicating with atmos )heric air, a demoimtable hood at theupper end of the casing, a hot air pipe leading from the hood, a flue pipe opening to the second compartment of the casing and .a flue-pipe leading fromthe tube containing comparh ment of the casing.

2. A heat economizer comprising cylindrical base having a fresh air pipe leading thereto,- a cylindrical casing mounted on the base and provided with a lower stationary head, a demountablo head closing the upper end of the casing, a set of air tubes secured to each, head, the tubes of one set being telescopically received within the tubes of the other set, a vertically disposed adjustable damper operating within the easing, a horizontally disposed baffle plate extending between one side of the casing and the damper and serving with the damper to divide the interior of the casing intotwo compartments one of which contains the tubes, a fine pipe communicating with the upper end of the second compartment,

a flue pipe leading from the upper end of the tube containing compartment, an, outer casing secured to, surrounding and spaced from the inner casing and having the lower end thereof communicating with atmospheric air, a demountable .hood carried by the upper end of the outer casing and heating pipe leading from the hood.

Signed at VVinnipeg this 7thday of March, 1927. 1 v

a stationary lower head car-.

JAMES CiWILSON; 

